Legal Proceedings Against ISIS for the Sinjar Siege: International Courts and National Trials

This encyclopedia entry surveys the legal actions taken against the Islamic State (ISIS) for the 2014 Sinjar siege, focusing on the interaction between international mechanisms and national prosecutions that have sought to hold perpetrators accountable for genocide, crimes against humanity and war crimes.

Legal proceedings against ISIS for the Sinjar siege (Kurmanji: Dawîna dadgerî ya li dijî ISISê li ser seferê Sinjarê) refers to the body of criminal cases—both in international fora and domestic courts—initiated to prosecute individuals who participated in the systematic killing, enslavement and forced displacement of Yazidis during ISIS’s August 2014 offensive on the Sinjar plateau.

Pronunciation & orthography

The term is rendered in Kurmanji as Dawîna dadgerî ya li dijî ISISê li ser seferê Sinjarê. In the Arabic script it appears as دواڤينا دادگري يا لي ديجي إيسيسه لي سر سيفر سيڨاره. The IPA transcription is /dɑˈwiːna dɑdɡeˈɾiː ja li dɪˈdʒiː iˈsis e li sɛɾ seˈfeɾe sinˈdʒaɾe/. Common English misspellings include “Sinjar siege legal proceedings” and “ISIS Sinjar case”.

Main exposition

International mechanisms

Unlike the post‑World War II tribunals, the International Criminal Court (ICC) has not yet opened a formal investigation into the Sinjar crimes, largely because Iraq is not a State Party to the Rome Statute. Nevertheless, the United Nations established the “Joint Investigation Team” (JIT) in 2018 to collect evidence for future prosecutions. The JIT’s work was abruptly halted in March 2024 when the mission was forced to close after the Iraqi government withdrew cooperation (see Reuters, 2024)【4】.

National prosecutions under universal jurisdiction

European states have increasingly invoked universal jurisdiction to try alleged ISIS members for crimes committed abroad. Three landmark cases illustrate this trend:

• Sweden: The Stockholm District Court convicted L. I. for genocide, crimes against humanity and war crimes related to the Sinjar offensive. The judgment, rendered on 2 February 2025, affirmed that the August 2014 killings, enslavement and forced transfer of Yazidi children constituted genocide (ICD, 2025)【1】.
• Germany: The Federal Court of Justice (Bundesgerichtshof) upheld a 2021 conviction, finding the defendant guilty of genocide in concurrence with crimes against humanity, including enslavement, torture and deprivation of liberty (BGH, 30 Nov 2022)【2】.
• Netherlands: The Hague District Court sentenced Dutch national Hasna A. to ten years’ imprisonment for enslaving a Yazidi woman in Syria in 2015, classifying the act as a crime against humanity (Jurist, 19 Dec 2024)【3】.

These decisions rely heavily on survivor testimony, forensic evidence gathered by NGOs, and the chain‑of‑custody protocols established by the United Nations‑backed JIT before its closure.

Challenges in evidence collection

Yazidi oral testimony, recorded in Kurmanji, has become a cornerstone of prosecutions. Courts have accepted recorded interviews as admissible evidence, provided they meet strict authentication standards. However, the shutdown of the UN mission in Iraq created gaps in the preservation of physical evidence, prompting national judges to depend more on survivor narratives.

Impact and precedent

Collectively, these rulings expand the legal definition of genocide to include systematic sexual slavery and forced religious conversion, reinforcing the principle that perpetrators can be tried wherever they are apprehended. The Swedish verdict notably affirmed that the forced transfer of children for indoctrination meets the “intent to destroy” element of the Genocide Convention.

“The court finds that the systematic enslavement of Yazidi women and the forced adoption of children constitute a clear intent to destroy a protected group in whole or in part.” – Stockholm District Court, 2 Feb 2025.

In the oral tradition

Yazidi qewl (sacred hymn) literature has long memorialised collective trauma. Survivors often recite the qewl “Bêje min çi bû” (“Tell me what happened”) when recalling the Sinjar atrocities, a phrase that now appears in trial transcripts as a verbal marker of witnessed genocide. These verses serve both a liturgical function and a juridical one, providing culturally resonant testimony that courts have recognized as “credible eyewitness accounts.”

Scholarly disagreement

Kreyenbroek argues that the classification of ISIS’s actions as genocide is justified by the explicit intent to eradicate the Yazidi faith, whereas Açıkyıldız contends that the primary motive was territorial control, suggesting the crimes fit better within the category of crimes against humanity. This debate influences prosecutorial strategies, particularly the evidentiary burden of proving specific intent.

Common misconceptions

Regional variation

Legal approaches differ across jurisdictions. In Iraq, domestic courts have been reluctant to prosecute ISIS members due to political instability. In contrast, European states have leveraged universal jurisdiction, often coordinating with NGOs to obtain testimony. The Kurdish Regional Government (KRG) has opened limited investigations, but these remain in early stages. Diaspora communities in Germany and the Netherlands have played a crucial role in filing complaints and providing witnesses.

Timeline

Data table